<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css">
    <style>
        .box{width: 100px;height: 100px;}
    </style>
</head>
<body>
    正在测试jsonp的原理
    <img src="https://img0.baidu.com/it/u=2213254486,3033129872&fm=26&fmt=auto" alt="">
    <a href="https://www.qq.com">asdasdas</a>
    <div class="box border bg-info">
        hello
    </div>
</body>
<script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.slim.min.js"></script>
<script>
    // console.log($);

    // fn("hahahaha");


    function fn(a){
        console.log(a);
    }

</script>
<script src="http://127.0.0.1:3000/hello.txt"></script>
</html>